package com.example.coolweather.util;

import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import androidx.fragment.app.Fragment;

import com.example.coolweather.MainActivity;
import com.example.coolweather.WeatherActivity;
import com.example.coolweather.db.City;
import com.example.coolweather.db.County;
import com.example.coolweather.db.Province;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class ChooseAreaFragment extends Fragment {

    public static final int LEVEL_PROVINCE = 0;

    public static final int LEVEL_CITY = 1;

    public static final int LEVEL_COUNTY = 2;

    private TextView titleText;

    private Button backButton;

    private ListView listView;

    private ArrayAdapter<String> adapter;

    private List<String> dataList = new ArrayList<>();

    /**省列表
     * */
    private List<Province> provinceList;

    /**市列表
     * */
    private List<City> cityList;

    /**县列表
     * */
    private List<County> countyList;


    /**选中省份
     * */
    private Province selectedProince;

    /**选中城市
     * */
    private Province selectedCity;

    /**当前选中的级别
     * */
    private int currentLevel;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState,Bundle saveInstanceState){
        View view = inflater.inflate(R.layout.choose_area,container,false);
        titleText = (TextView) view.findViewById(R.id.title_text);
        backButton = (Button) view.findViewById(R.id.back_button);
        listView = (ListView) view.findViewById(R.id.list_view);

        adapter = new ArrayAdapter<>(getContext(),andorid.R.layout.simple_list_item_1,dataList);
        listView.setAdapter(adapter);
        return view;
    }

    @Override
    public void onActivityCreated(Bundle saveInstanceSate){
        super.onActivityCreated(saveInstanceSate);
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                if(currentLevel == LEVEL_PROVINCE){
                    selectedProince = provinceList.get(position);
                    queryCities();
                } else if(currentLevel == LEVEL_CITY){
                    selectedCity = cityList.get(position);
                    queryCounties();
                } else if(currentLevel == LEVEL_COUNTY){
                    String weatherId = countyList.get(position).getWeatherId();
                    if (getActivity() instanceof MainActivity){
                        Intent intent = new Intent(getActivity(),WeatherActivity.class);
                        intent.putExtra("weather_id",weatherId);
                        startActivity(intent);
                        getActivity().finish();
                    } else if (getActivity() instanceof WeatherActivity){
                        WeatherActivity activity = (WeatherActivity) getActivity();
                        activity.drawerLayout.closeDrawer();
                        activity.swipeRefresh.setRefreshing(true);
                        activity.requestWeather(weatherId);
                    }
                }
            }
        });
        backButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if(currentLevel == LEVEL_CITY){
                    queryCities();
                } else if(currentLevel == LEVEL_CITY){
                    queryProvinces();
                }
            }
        });
        queryProvinces();
    }


    /*
      查询全国所有的省，优先从数据库查询，如果没有查询到再去服务器上查询
     */
    private void queryProvinces(){
        titleText.setText("中国");
        backButton.setVisibility(View.GONE);
        provinceList = DataSupport.findAll(Province.class);

        if(provinceList.size() > 0){
            dataList.clear();
            for(Province province:provinceList){
                dataList.add(province.getProvinceName());
            }
            adapter.notifyDataSetChanged();
            listView.setSelection(0);
            currentLevel = LEVEL_PROVINCE;
        } else {
            String address = "http://guolin.tech/api/china";
            queryFromServer(address,"province");
        }
    }


    /*
    * 查询省内所有城市，优先从数据库查询，如果没有查询到再去服务器上查询
    */
    private void queryCities(){
        titleText.setText(selectedProince.getProvinceName());
        backButton.setVisibility(View.VISIBLE);
        cityList = DataSupport.where("provinceid = ?",String.valueOf(selectedProince.getId())).find(City.class);

        if(cityList.size() > 0){
            dataList.clear();
            for(City city:cityList){
                dataList.add(city.getCityName());
            }
            adapter.notifyDataSetChanged();
            listView.setSelection(0);
            currentLevel = LEVEL_CITY;
        } else {
            int provinceCode = selectedProince.getProvinceCode();
            String address = "http://guolin.tech/api/china"+provinceCode;
            queryFromServer(address,"city");
        }
    }


    /*
     * 查询选中市内的所有县，优先从数据库查询，如果没有查询到再去服务器上查询
     */
    private void queryCities(){
        titleText.setText(selectedCity.getCityName());
        backButton.setVisibility(View.VISIBLE);
        countyList = DataSupport.where("cityid = ?",String.valueOf(selectedCity.getId())).find(County.class);

        if(countyList.size() > 0){
            dataList.clear();
            for(County county:countyList){
                dataList.add(county.getCountyName());
            }
            adapter.notifyDataSetChanged();
            listView.setSelection(0);
            currentLevel = LEVEL_COUNTY;
        } else {
            int provinceCode = selectedProince.getProvinceCode();
            int cityCode = selectedCity.getCityCode();
            String address = "http://guolin.tech/api/china"+provinceCode+"/"+cityCode;
            queryFromServer(address,"county");
        }
    }


    /*
     * 根据传入的地址和类型从服务器上查询省市县数据
     */
    private void queryFromServer(String address,final String type){
        showProgressDialog();
        HttpUtil.sendOkHttpRequest(address,new Callback(){

            @Override
            public void onResponse(Call call,Response response) throws IOException{
                String responseText = response.body().string();
                boolean result = false;
                if("province".equals(type)){
                    result = Utility.handleProvinceResponse(responseText);
                } else if("city".equals(type)){
                    result = Utility.handleCityResponse(responseText, selectedProince.getId());
                } else if("county".equals(type)){
                    result = Utility.handleCountyResponse(responseText,selectedCity.getId());
                }
                if(result){
                    getActivity().runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            if("province".equals(type)){
                                queryProvinces();
                            } else if ("city".equals(type)){
                                queryCities();
                            } else if ("county".equals(type)){
                                queryCounties();
                            }
                        }
                    });
                }
            }

            @Override
            public void onFailure(Call call, IOException e){
                // 通过 runOnUiThread() 方法回到主线程处理逻辑
                getActivity().runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        closeProgressDialog();
                        Toast.makeText(getContext(),"加载失败",Toast.LENGTH_SHORT).show();
                    }
                });
            }
        });
    }

    /*
    *显示对话框进度
    * */
    private void showProgressDialog(){
        if(progressDialog == null){
            progressDialog = new ProgressDialog(getActivity());
            progressDialog.setMessage("正在加载...");
            progressDialog.setCanceledOnTouchOutside(false);
        }
        progressDialog.show();
    }

    /*
     *关闭进度对话框
     * */
    private void closeProgressDialog(){
        if(progressDialog != null){
            progressDialog.dismiss();
        }
    }

}
